1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3a60036e87e6af1c4e99c58204a15f0732e2e3bbfd7e5ac00a219acce64d1b. Chain 2 (Bitcoin): anchored in block 954039 (2026-06-17T03:00:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e9008d1-14fd-424a-b34e-a2a6368cca41.json and https://artists.proofprofile.net/proofs/artist/3e9008d1-14fd-424a-b34e-a2a6368cca41.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9b98946bf4a3e153c144c1476efd3ad5f09de3d3cbd8b5d01103b86d41c71a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2642148601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731500947d1a57090de14b569614280b64d3e75088df575a98a2d47f8abf76d1. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2642148602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0e31c0ae05ba6ac0886db2bd8846e604493f405dfd5d7a5a8874d181afcf3a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2642148603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aed49d825e216d8b1e632fa4cb1a0ba72a5e572436483c022ae308579f71be1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2642148606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119a806174b43b94f2ace430f86902e52b89e454d06d74a9a3faef303f0c4b11. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2642148604.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287e6fca5217a37c72ad2c061f0c88c410838dd3e1beed3eee56551a451e8f8d. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2642148605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcefcb64c21d6f84bfe853a6c2b56ea916629595f9353f9003f640fa5fe784bf. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2642148607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afdfa9e5b499b9cfef486631ce526cc1a6f10517c138315c8e18314c48cb07c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2642148608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370ccd1bd91bd1df1c203b3dbedc2c4ce190ff2741c27c8d19ba887d1db83676. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2641739301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb801214f0467db85206a82e14186d7231fcdd7657446481e90ede9eb8e42627. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2641739302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d7fe0de68713e0823d17e285398dcedd4715ff90b3f27f5b7f1244cea32b87. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2641739304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399db73324a7390a3f0dfb4edabe22c1e4cb6a6acaf0da9f6aa48b8ce74c8ab6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2641739305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91a4285ccab7d14c9a1603be3b0003bbec198444001397ab3f52d44053baa89. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2641739306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59c92f9b6a97cda06c4edb76fb39cdb4e7a723e30a7483139c430ef7e761f3e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2641739307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31de3e72fd984080d07148dce7232977f6fb01a377b130df47f26f14b168874f. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2641739303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656e8fbfffbc5d6acb491ef424f858eeb1afb2dbed581d57aba6360199e153b1. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2641739308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87f8e0a5f8bb2ad1bbd5a734daf2aefd4cb415c6b8bd532bace9b9785f3f113. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USQY51558106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fb1a7f976237a36334d57bba91318db3e0b554fd14024b716b15b606c9836e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USQY51558108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79116a7fb5a1adaa88079eb2c0365511932e77c6eb41340698af393956f1a1e. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USQY51558103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abd55f66967194fd586bab84ed8c5940fb552d0ad00cf431b7e32ddbd2feae1. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USQY51558104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f79a59318237139cfca772a4b64dbbd5585a8b846f1d3a25799b34a4e6591cf. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USQY51558105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602c0d431e7562ccd533fb3aed45d75a77b1839383a2daf7f3017329dd9ab97b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USQY51558107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319a2b7e2ae8ae883acb88eef60b4b8f70659a31971ed9376c54b215fc3d600c. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USQY51558109.